require 'rvg/rvg'

Magick::RVG.dpi = 90

rvg = Magick::RVG.new(12.cm, 4.cm).viewbox(0, 0, 1200, 400) do |canvas|
  canvas.background_fill = 'white'
  canvas.desc = 'Example polyline01 - increasingly larger bars'

  # Show outline of canvas using the 'rect' method
  canvas.rect(1195, 395, 1, 1).styles(fill: 'none', stroke: 'blue', stroke_width: 2)

  canvas.polyline(
    50, 375,
    150, 375, 150, 325, 250, 325, 250, 375,
    350, 375, 350, 250, 450, 250, 450, 375,
    550, 375, 550, 175, 650, 175, 650, 375,
    750, 375, 750, 100, 850, 100, 850, 375,
    950, 375, 950, 25, 1050, 25, 1050, 375,
    1150, 375
  ).styles(fill: 'none', stroke: 'blue', stroke_width: 10)
end

rvg.draw.write('polyline01.gif')
